I have a Cetme and I they run great. They have issues. The new black furniture they come with is total crap, get rid of it and throw an HK furniture set on it and dont look back. Next thing is the trigger pull, it sucks. I had Bill Springfeild at TriggerWork.net to a trigger job, likewise the cetme rear sights suck, I had bill also put on a HK rear drum.
None of the American imported or made cetme/g3s have a paddle release. It makes the rifle suck ergo wise, I had Bill put in an HK paddle release. The rifle is great now. A Cetme will eat any ammo you put in it, even the crappyist steel cased ammo. Great battle rifles after some work. My Cetme with $250 worth of work can run head to head with any PTR or HK91.
Another note, the Cetme locking pins for the handguards and stock suck, it's a good idea to replace them with HK ones.